One of my dogs had the same anal gland rupture twice, about a year apart. No cone, no bandage etc. He did have some homeopathic remedies though. In any case, it healed up nicely. Both times it was in the dead of winter and I would look outside to see him cooling his butt on the snow. It apparently helped his discomfort a lot.
I was worried at the time that he would end up needing surgery since that had happened twice, but it hasn't happened in over 6 years (touching wood).